Apparatus for facilitating the multiplication of numbers



(No Model.)

J. V. GHARPANTIER.

-APPARATUS POR FAGILITATING THE MULTIPLIGATION 0F NUMBERS.

No. 343,796. Patented June 15, 1886.

WITNBSSBS INVENTOI?.

- M/waag BY M ATTORNEYS.

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UNITED STATES PATENT OFFICE. y

JULES V. CHARPANTIER, OF NEV ORLEANS, LOUISIANA.

APPARATUS FOR FAClLlTATlNG THE MULTIPLICATlON 0F NUMBERS.

SPECIFICATION'forming part of Letters Patent No. 343,796, dated June 15,1856.

Application filed Januar; '10, 1886. Serial Xo. 189,232. (No model.)

To @ZZ whom it may concern.-

Be it known that I, JULES V. GHARPAN- TIER, of New Orleans, in theparish of Orleans and State of Louisiana, have invented a new and usefulImprovement in Apparatus for Facilitating the Multiplication of Numbers, of which the following is a description.

Figure l is a perspective view of my improved apparatus, parts beingbroken away and others shown in section; and Fig. 2 is a plan view ofthe apparatus, the lid being removed.

The present invention relates especially to improvements on the devicecovered by my former patent, No. 322,160. 'In the practice of thepresent inveution,I employ the saule series of independent sectionsinscribed with numerals described in my former application, as well asthe reference tables or book therein described. In the presentapplication therefore I will not repeat the description of such partsnor illustrate the same except as they are necessary to a fullunderstanding of my improvements.

The present invention consists in a novel combination and arrangement ofthe sectionsupports as well as in an index, arranged as will behereinafter explained.

The box or case A may be of any suitable construction, opening at oneside as shown, which opening may be covered with glass when so desired.In the front of the box I secure parallel to each other a series ofguides, B, preferably journaled rollers, as shown. These guides areplaced in close relation, usuallya distance apart equal to the thicknessof two sheets ofpaper, about as shown. Manifestly the numbers of theseguides may be varied. In the box in rear of these guides I arrangecarrying-rolls C O, two for each of the guides having knobs c, by whichthey may be turned. It is preferred to arrange the rolls of each pair,one in rear of the other, in order that a larger number of rolls may bearranged in a given Width of box, as will be understood from Fig. 2. Thesections D being sheets usually of paper, inscribed as described in myformer patent, are supported alike, so the description of one willanswer for all. Such sheet, it will be seen, is passed around one of theguides B, and has its ends passed through between such guide and thoseon opposite but a single row is exposed at a time.

sides thereof, and such ends are then carried to and wound on the rollsO of the pair used in connection with the particular guide B, as will beseen in Fig. 2. By thus disposing the inscribed sheets, it will be seenI am able to bring the registered portions of the several sheets inclose relation, and also expose but a single longitudinal row of figuresof each of said sheets at the same time. Thus I prevent the possibilityof misreading the several sheets or of reading from one row of figuresof one sheet when another should be considered, as Belts E are disposedaround the rolls C and guide B of each set, and serve to communicatepositively to each member of the set the motion given to any one thereofby the. operator, enabling a rapid and easy movement of the inscribedsections and serving to prevent any slipping thereof.

As suggested a difficulty arises in the multiplication by the aid of theapparatus described in my said patent of any number of more than threefigures, which difficulty is met by a reference bool; or table having anumber of sets of lettered references, one set relating to the fourthinscribed table, another to the fifth, and so on.

To avoid the possibility of error in referring to such table, I providean index, F, numbering l 2 3, die., ranging from the fourth section out,l referring to fourth, 2 to fifth, 3 to sixth section, and so on. Bythis means there is at once indicated to the operator the page orsection of the reference-table to which he should refer in registering afigure in any given one of the inscribed sections. By theseconstructions I secure a better apparatus by preventing all mistakes ofreading and by exhibiting clearly the table of reference to which theoperator should refer.

Having thus described my invention, what I claim as new isl. Thecombination of the support or case, the movable sections inscribedsubstantially. as shown, and an index, F, arranged relatively to therolls and beginning at l with a predetermined one of said sect-ions andcontinuing in proper numerical order in relation with the succeedingsections, substantially as set forth.

2. The improved apparatus for facilitating the 'multiplication ofnumbers, consisting of .i D the support or oase, the series ofcarrying-rolls glnnlng at 1 wlth a predetermined one of the VVVarn'ingedin pairs,theseries of guides arranged tables or sections, and continuingin proper Io close together and provided one for each pair numericalorder in relation with the succeed of carrying-rolls, the tables orsections Wound ing sections, substantially as Set forth.

5 on the carrying-rolls and directed between JULES V. GHARPANTIER.

their ends lround the guides, the belts con- Witnesses: nesting thecarrying-rolls and guides, and the MICHL. GERNON, index arrangedrelatively to the rolls and bel J. C. DELANGNE, Jr.

